85 lines
2.2 KiB
C
Executable file
85 lines
2.2 KiB
C
Executable file
/*
|
|
* Old U-boot compatibility for Walnut
|
|
*
|
|
* Author: Josh Boyer <jwboyer@linux.vnet.ibm.com>
|
|
*
|
|
* Copyright 2007 IBM Corporation
|
|
* Based on cuboot-83xx.c, which is:
|
|
* Copyright (c) 2007 Freescale Semiconductor, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation.
|
|
*/
|
|
|
|
#include "ops.h"
|
|
#include "stdio.h"
|
|
#include "dcr.h"
|
|
#include "4xx.h"
|
|
#include "io.h"
|
|
|
|
BSS_STACK(4096);
|
|
|
|
static void walnut_flashsel_fixup(void)
|
|
{
|
|
void *devp, *sram;
|
|
u32 reg_flash[3] = {0x0, 0x0, 0x80000};
|
|
u32 reg_sram[3] = {0x0, 0x0, 0x80000};
|
|
u8 *fpga;
|
|
u8 fpga_brds1 = 0x0;
|
|
|
|
devp = finddevice("/plb/ebc/fpga");
|
|
if (!devp)
|
|
fatal("Couldn't locate FPGA node\n\r");
|
|
|
|
if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
|
|
fatal("no virtual-reg property\n\r");
|
|
|
|
fpga_brds1 = in_8(fpga);
|
|
|
|
devp = finddevice("/plb/ebc/flash");
|
|
if (!devp)
|
|
fatal("Couldn't locate flash node\n\r");
|
|
|
|
if (getprop(devp, "reg", reg_flash, sizeof(reg_flash)) != sizeof(reg_flash))
|
|
fatal("flash reg property has unexpected size\n\r");
|
|
|
|
sram = finddevice("/plb/ebc/sram");
|
|
if (!sram)
|
|
fatal("Couldn't locate sram node\n\r");
|
|
|
|
if (getprop(sram, "reg", reg_sram, sizeof(reg_sram)) != sizeof(reg_sram))
|
|
fatal("sram reg property has unexpected size\n\r");
|
|
|
|
if (fpga_brds1 & 0x1) {
|
|
reg_flash[1] ^= 0x80000;
|
|
reg_sram[1] ^= 0x80000;
|
|
}
|
|
|
|
setprop(devp, "reg", reg_flash, sizeof(reg_flash));
|
|
setprop(sram, "reg", reg_sram, sizeof(reg_sram));
|
|
}
|
|
|
|
#define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b
|
|
static void walnut_fixups(void)
|
|
{
|
|
ibm4xx_sdram_fixup_memsize();
|
|
ibm405gp_fixup_clocks(33330000, 0xa8c000);
|
|
ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
|
|
ibm4xx_fixup_ebc_ranges("/plb/ebc");
|
|
walnut_flashsel_fixup();
|
|
dt_fixup_mac_address_by_alias("ethernet0", (u8 *) WALNUT_OPENBIOS_MAC_OFF);
|
|
}
|
|
|
|
void platform_init(void)
|
|
{
|
|
unsigned long end_of_ram = 0x2000000;
|
|
unsigned long avail_ram = end_of_ram - (unsigned long) _end;
|
|
|
|
simple_alloc_init(_end, avail_ram, 32, 32);
|
|
platform_ops.fixups = walnut_fixups;
|
|
platform_ops.exit = ibm40x_dbcr_reset;
|
|
fdt_init(_dtb_start);
|
|
serial_console_init();
|
|
}
|